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Mesa

 

The Mesa is the only hysteresis loop tracer on the market that can make measurements in the frequency range of 10 Hz and below. Competing units operate with more-easily generated 60 Hz drive fields, and can have errors of as much as 30% in coercivity (Hc) measurements.

 

This latest generation instrument is fully computer controlled and capable of displaying and measuring BH loops, magnetoresistance (MR/GMR), and magnetostriction.

 

All instruments are equipped with a "pattern memory" feature, to digitally cancel ambient magnetic fields and allow for operation at extremely high sensitivities, even in relatively noisy magnetic environments.  Digital Signal Processing allows any remaining noise to be dramatically reduced by digital filtering algorithms.

 

Shb Instruments magnetic measurement systems can also be used for measurement of bulk magnetic material.

Options​

 

The Mesa is the only instrument of its type designed to make measurements in the frequency range of 10 Hz and below, avoiding the substantial errors inherent in higher frequency operation.

 

The Mesa is controlled by a PC running Microsoft Windows, and uses internal DSP processors for high-speed waveform generation, digitization and processing. All instruments are equipped with a "pattern memory" feature to digitally cancel ambient magnetic fields and allow for operation at extremely high sensitivities, even in relatively noisy magnetic environments. Digital Signal Processing allows any remaining noise to be dramatically reduced by sophisticated digital filtering algorithms.

 

Options include pickup assembly size, drive coil diameter (maximum sample size), SECS/GEM support and Autoloading.

Features

 

  • Real-time measurements

  • AutoTest recipe creation and management software

  • No need to cut wafers

  • High sensitivity

  • Excellent repeatability

  • Advanced DSP signal processing

  • Optional autoloader

  • Accommodates wide range of sample sizes and thicknesses

  • Magnetoresistance (MR/GMR)

  • Magnetostriction

  • Measurements

    • Br

    • Bs

    • R

    • ΔR

    • Hc

    • He

    • Hk

    • Magnetostriction

    • Dispersion

    • Skew

  • Low-frequency sinewave sweeps (5 to 10 Hz)

  • 0.01 to 1000 Oe/division horizontal sensitivity range

  • 0.01 to 10,000 nW/division vertical sensitivity range

  • Digital background subtraction to cancel ambient fields

  • Earth's field cancellation

  • Two-axis drive coils

  • Cursor for detailed waveform measurements

  • shbWin control software provides flexible and friendly instrument operation

  • Supports Microsoft Active-X object model for optional user program control of all instrument functions and measurements

  • Digitize multiple hysteresis loops; display on PC and save to disk

  • Remote instrument operation and troubleshooting via modem or network

  • SECS/GEM support available

     

Specifications
Mesa specs.png
High-Performance Pickup Assemblies for Mesa

 

All of the pickup assemblies for the Mesa offer outstanding measurement stability and repeatability. The patented Shb TripleBobbin design offers more than an order of magnitude improvement in performance compared to the original Model 109A pickups.

 

  • Patented internal geometry and material improve balance stability

  • Includes R and dR/R probing

  • Improved immunity to external magnetic fields

  • Increased sensitivity

  • Improved mechanical stability and immunity to external stresses

  • Extraordinary thermal stability allows for accurate measurements of very thin films at high drive fields.

  • Latest pickups for the Mesa offer both autoloading and computer-controlled sample rotation, for convenience and improved measurement accuracy.

 

 

shbWin Control Software

 

The shbWin control software for the MESA brings a new level of flexibility and functionality to instrument operation.

 

  • AutoTest recipe creation and management

  • Password protected operating modes

    • Operator

    • Engineer

    • Maintenance

    • Factory

  • Microsoft ActiveX support allows optional user programming in Visual Basic, C++ or Java

  • Real-time on-screen waveform display

  • Remote diagnosis

  • AutoTrim makes all instrument adjustments with one menu selection

  • SECS/GEM option

 

Magnetostriction & Magnetoresistance Pickup Assemblies for Mesa

 

Specialized magnetostriction pickups are used to measure the magnetostrictive effect in samples on thin substrates. The sample is bent using a set of three equally-spaced ceramic knife edges, and the change in Hk is then measured.

​

  • Resolution to one part in 10^8

  • Force on sample can be precisely controlled by setting in each individual recipe.

 

 

Magnetoresistance pickups have probe sets that measure with inline or rectangular configuration, in either Norm or Tran direction.

 

 

 

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